Sarnia
October
Weather in Sarnia for October 2025
Your guide to Sarnia weather in October - trends and predictions
In general, the average temperature in Sarnia at the beginning of October is 21.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.6 °C by the end of October.
The climate of Sarnia in October is notably wet, with an average of 13 rainy days, and a total of 84.2 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
13
Rainy days
0
Snow days
16°/8°
Temperatures
24 km/h
Avg max wind
73 %
Avg humidity
Sarnia in October average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2 23° | 3 24° | 4 24° | 5  23° | ||
| 6  21° | 7 14° | 8 13° | 9 14° | 10  13° | 11 17° | 12 15° |
| 13 14° | 14  10° | 15 10° | 16 11° | 17 15° | 18  18° | 19  18° |
| 20 18° | 21 18° | 22 16° | 23 14° | 24 17° | 25 16° | 26 16° |
| 27 16° | 28 15° | 29 14° | 30 13° | 31 12° |
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Temperatures trend during October in Sarnia
See the weather trend as well as the moving average line
October weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Oct. | Fog | 23° /12° | 4.5 mm | 5 | |
| 2 Oct. | Fog | 23° /11° | 0 mm | 5 | |
| 3 Oct. | Fog | 24° /9° | 0 mm | 6 | |
| 4 Oct. | Fog | 24° /13° | 0 mm | 5 | |
| 5 Oct. | Light drizzle | 23° /12° | 0.9 mm | 5 | |
| 6 Oct. | Light rain shower | 21° /10° | 6.2 mm | 5 | |
| 7 Oct. | Patchy rain possible | 14° /7° | 0.3 mm | 4 | |
| 8 Oct. | Light rain shower | 13° /4° | 0.5 mm | 4 | |
| 9 Oct. | Patchy rain possible | 14° /3° | 0 mm | 4 | |
| 10 Oct. | Overcast | 13° /6° | 0 mm | 3 | |
| 11 Oct. | Patchy rain possible | 17° /6° | 0.2 mm | 4 | |
| 12 Oct. | Patchy rain possible | 15° /8° | 1 mm | 4 | |
| 13 Oct. | Overcast | 14° /8° | 0 mm | 3 | |
| 14 Oct. | Heavy rain | 10° /7° | 15.4 mm | 3 | |
| 15 Oct. | Light rain shower | 10° /6° | 23.7 mm | 3 | |
| 16 Oct. | Patchy rain possible | 11° /7° | 3.2 mm | 3 | |
| 17 Oct. | Overcast | 15° /4° | 0 mm | 4 | |
| 18 Oct. | Cloudy | 18° /5° | 0 mm | 5 | |
| 19 Oct. | Moderate rain | 18° /7° | 2.7 mm | 4 | |
| 20 Oct. | Light rain shower | 18° /7° | 1 mm | 5 | |
| 21 Oct. | Patchy rain possible | 18° /8° | 0.1 mm | 5 | |
| 22 Oct. | Patchy rain possible | 16° /7° | 0.1 mm | 5 | |
| 23 Oct. | Patchy rain possible | 14° /4° | 0 mm | 4 | |
| 24 Oct. | Patchy rain possible | 17° /5° | 0.3 mm | 5 | |
| 25 Oct. | Light drizzle | 16° /8° | 1.8 mm | 4 | |
| 26 Oct. | Light rain | 16° /10° | 1.5 mm | 5 | |
| 27 Oct. | Patchy rain possible | 16° /10° | 1.3 mm | 5 | |
| 28 Oct. | Overcast | 15° /6° | 0.1 mm | 4 | |
| 29 Oct. | Light rain | 14° /6° | 17.9 mm | 4 | |
| 30 Oct. | Patchy rain possible | 13° /8° | 1.1 mm | 3 | |
| 31 Oct. | Overcast | 12° /5° | 0.5 mm | 3 | |
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Important Notice
Our weather forecast for Sarnia in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sarnia forecast closer to your planned date for the most up-to-date weather information.
Sarnia in October - FAQ
What are the expected maximum and minimum temperatures in Sarnia during October?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sarnia during October?
Moderate rainfall is anticipated in Sarnia during October, with a total of 84.2 mm spread over approximately 13 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Sarnia during October?
The average wind speed in Sarnia during October is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Sarnia
Explore the daily rainfall trends and prepare for Sarnias October weather 💧
UV exposure in Sarnia during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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